Michael G. Bator - Aug 8, 2025 Form 4 Insider Report for Cytosorbents Corp (CTSO)

Role: Director
Signature: /s/ Peter J. Mariani attorney-in-fact Michael G. Bator
Stock symbol: CTSO
Transactions as of: Aug 8, 2025
Transactions value $: $0
Form type: 4
Date filed: 8/8/2025, 07:38 PM
Previous filing: Mar 4, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
BATOR MICHAEL G.	Director	C/O CYTOSORBENTS CORPORATION, 305 COLLEGE ROAD EAST, PRINCETON	/s/ Peter J. Mariani attorney-in-fact Michael G. Bator	2025-08-08	0001647591

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	CTSO	Common Stock						151K	Aug 8, 2025	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	CTSO	Stock Option (Right to Buy)	Award	$0	+44K		$0.00	44K	Aug 8, 2025	Common Stock	44K	$1.00	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Includes (a) the following restricted stock units ("RSUs") which will vest upon a "Change of Control" of the Company, as defined in the CytoSorbents Corporation 2014 Long-Term Incentive Plan (the "Plan"): (i) 3,300 RSUs granted on March 15, 2018, (ii) 6,000 RSUs granted on February 24, 2017, and (iii) 60,000 RSUs granted on June 7, 2016, and (b) 81,973 shares of Common Stock owned by the Reporting Person.
F2	The stock options were granted pursuant to the Plan. The shares underlying the stock options will vest in four (4) equal quarterly installments over a period of one year following the date of grant, subject to the reporting person's continued service as of the applicable vesting date.

Content

Includes (a) the following restricted stock units ("RSUs") which will vest upon a "Change of Control" of the Company, as defined in the CytoSorbents Corporation 2014 Long-Term Incentive Plan (the "Plan"): (i) 3,300 RSUs granted on March 15, 2018, (ii) 6,000 RSUs granted on February 24, 2017, and (iii) 60,000 RSUs granted on June 7, 2016, and (b) 81,973 shares of Common Stock owned by the Reporting Person.

The stock options were granted pursuant to the Plan. The shares underlying the stock options will vest in four (4) equal quarterly installments over a period of one year following the date of grant, subject to the reporting person's continued service as of the applicable vesting date.